A034267 a(n)=f(n,n) where f is given in A034261.

0, 1, 7, 39, 196, 930, 4257, 19019, 83512, 361998, 1553630, 6615686, 27992472, 117823940, 493768485, 2061580275, 8580127920, 35611376790, 147447066690, 609200868210, 2512267906200, 10342848445020, 42516521451690, 174535009040574

Offset

1,3

Links

Table of n, a(n) for n=1..24.

Crossrefs

Sequence in context: A032207 A004057 A081898 * A198767 A026752 A026379

Adjacent sequences: A034264 A034265 A034266 * A034268 A034269 A034270

Keyword

nonn

Author

Clark Kimberling

Extensions

Corrected and extended Apr 21 2000 - N. J. A. Sloane.

Status

approved